```go
package main

import (
	"bufio"
	"fmt"
	"os"
	"sort"
)

func main() {
	reader := bufio.NewReader(os.Stdin)
	var n int
	var a, b, k int64
	fmt.Fscan(reader, &n, &a, &b, &k)

	sum := a + b
	costs := make([]int64, 0, n)
	base := 0

	for i := 0; i < n; i++ {
		var h int64
		fmt.Fscan(reader, &h)
		r := h % sum
		if r == 0 {
			r = sum
		}
		if r <= a {
			base++
		} else {
			cost := (r + a - 1) / a - 1
			costs = append(costs, cost)
		}
	}

	sort.Slice(costs, func(i, j int) bool { return costs[i] < costs[j] })

	res := base
	used := int64(0)
	for _, c := range costs {
		if used+c <= k {
			used += c
			res++
		} else {
			break
		}
	}

	fmt.Println(res)
}
```